WIP auth with base64 encoded string

src/main/java/org/caosdb/server/grpc/AuthInterceptor.java

 package org.caosdb.server.grpc;
 
+import java.util.Base64;
+import org.apache.shiro.SecurityUtils;
+import org.apache.shiro.authc.AuthenticationException;
+import org.apache.shiro.subject.Subject;
+import org.caosdb.server.CaosDBServer;
+import org.caosdb.server.ServerProperties;
+import org.caosdb.server.accessControl.AnonymousAuthenticationToken;
+import org.caosdb.server.accessControl.RealmUsernamePasswordToken;
+import org.caosdb.server.accessControl.UserSources;
 import io.grpc.Context;
 import io.grpc.Contexts;
 import io.grpc.Metadata;
@@ -9,14 +18,6 @@ import io.grpc.ServerCall.Listener;
 import io.grpc.ServerCallHandler;
 import io.grpc.ServerInterceptor;
 import io.grpc.Status;
-import org.apache.shiro.SecurityUtils;
-import org.apache.shiro.authc.AuthenticationException;
-import org.apache.shiro.subject.Subject;
-import org.caosdb.server.CaosDBServer;
-import org.caosdb.server.ServerProperties;
-import org.caosdb.server.accessControl.AnonymousAuthenticationToken;
-import org.caosdb.server.accessControl.RealmUsernamePasswordToken;
-import org.caosdb.server.accessControl.UserSources;
 
 /**
  * ServerInterceptor for Authentication. If the authentication succeeds or if the caller is
@@ -50,7 +51,7 @@ class AuthInterceptor implements ServerInterceptor {
    * subject.
    */
   private Subject basicAuth(final String base64) {
-    final String plain = base64; // TODO =new String(Base64.getDecoder().decode(base64));
+    final String plain = new String(Base64.getDecoder().decode(base64));
     final String[] split = plain.split(":", 2);
     final String username = split[0];
     final String password = split[1];